Not sure what my problem is

[Acid]

I installed a new tappet plate Systema area 1000 for version 2 gearboxes into my ICS spilt gearbox the reason for replacement was that my old one was tattered and bent a bit

so i can connect the upper and lower sections fine but the problem is it wont feed so looking into it i took the upper part of the gearbox and I was able to press the air nozzle in fully and it would then spring back

when the upper and lower sections are connected the air nozzle gets pulled back and so then it is not able to move fully as it only retracts a little bit then springs back a little bit to how it was